Pulley block



Feb. 16,1926. 1,573,351

F. B. MALLORY PULLEY BLOCK Filed April 10. 1923 2 Sheets-Sheet 1 fvz/v-ron. F135 11 Mm 5v F. B. MALLORY PULLEY BLOCK Filed April 10, 1923 2 Sheets-Sheet 2 [N ms/vra/P:

Patented Feb. 16, 1926.

'rnnnEnIoK'B. MALLonY, or PORTLAND, OREGON.

PULLEY :BnooK.

Application aieaii rn 10, 1923; Serial No. 631,158.

To czll whom it may concern: I Be' it known that I, FREDERICK B. MAL- LORY, a citizen of the United States of America, and resident of Portland, in the county of Multnomah, in the State of Oregon, have inventedcertain new and'use-' ful Improvements in Pulley Blocks, of which the following is a specification, reference being had to the accompanying drawings.

My invention belongs to a class of pulley blocks which are adapted for service in inaccessible situations and for comparatively long periods, during which each block must be dependable for endurance and performance of duty without attention, and must be constantly self-lubricating tl1e.while,.in any of the numberless operative positions which it may and does from time to time assume in use. i The main object of my invention to produce a block which may be relied upon to satisfy all the aforesaid requirements of the class of blocks designated.

What constitutes my invention willnbe hereinafter specified in detail and succinctlyv set forth in the appended claims;

In the accompanying drawings, Figure I is an edgewise elevation, partly in medial vertical section of a block exhibit ing my invention in present preferred form of embodiment. I

Figure II is a transverse section line IL-II of Figure I. Y

, Figure III is a section of a portion of Figure I, taken on the .line IIIIII-there or, and looking downwardly, the sheave and its hub being omitted. i Figure IV is a detail sectional view taken on the line IV-IV of Figure III. T Figure V is a perspective of one of the journal-bearings of my block detached and on the looking towards the inner end thereof.

Iiigure VI is a transverse section on the. line VIVI of. Figure III, looking up wa-rdly.

Referring to the numerals on the drawings, 1 and 2 indicate, respectively, two bloclrsicles which are counterparts one of the other, and which, when bolted together in operative assemblage as with a shackle 3 and a cross-head at, are designed and adapted to carry between them a sheave 5, which is fixed to a rotativeshaft 6 provided with suitable journals 7 for mounting it'in the block.

The above enumerated elements, so far as above described, may be of any usual or preferred construction.

lily invention comprehends means pro vided for improving the construction of each block'side with a view to increasing its structural strength, and to embodying into suchconstruction definite provision of new anduseful means for self-lubrication of thewearing parts of the block.

To those ends, I provide a lateral assenr bling member 8 preferably consisting of an external shell of such smooth curvilinear contour in cross section as is illustrated, the same being deemed most suitable to contribute ;resistanceto crushing force from without, and relief, inlarge measure, from shock as the result. of direct impact with objects'against which there is, in use, constant. danger of collision.

Upon the member 8, say within the hollow of the shell which is the preferred form of the assembling memberS, I provide a plu- 'ality of integral webs which afiord, individuallyand collectively, a support, of truss effect, for thomember 8 and for one a11- other. The number of said webs compre heads, for example, a marginal rim 9; a pair of walls 10 extending from one side of said ri n'to terminals disposed on opposite sides of thecenter of the rim and spaced apart within the shell to best advantage for strengthening the same; a pair of divergent walls 11 which proceed from the ends of the walls 10 into which they merge; a segmental wall 12 with its supporters 13, concentric to therim 9 and uniting the, opposite flaring ends of the walls 11; and a journal-bearing support 16 adapted to carry a bearing 17, which in the present instance is formed independently of the block-side and. will be hereinafter fully described. The webs above enumerated are, in effect, a truss. beingunited and preferably cast in an integral whole with the member 8 and conjoint cover-plates 14; vand 15, which serve, respec' tively, to support transversely the enclosure defined by the wall 10 and the rim 9 on the one part, and. that. defined by the walls 11 and 12 on the other.

The width of the space which separates the walls. 10, and the angle of divergence the disposition. of the wall 12,- should be such-as to qualify said wallso'riwebs cl= lectively to the lending to the shellarnaximum degree of resistance againstoutside crushing force, and also the lendin of strength. stiffness, and rigidity to the-journal-bearing support 16 which is disposed in the space between the walls-3 andlij shown in Figures I and VI.

The relationship b6tWB611.tl1BJVfiillSllQ and the walls 11, respectively, is also, in part, determined. .bythe fact that theyec'oir stitute the side wallsof the twoseparate' his bricating chambers whichv constitute independent sources of lubricant supply to the respective journals 7. l

The walls are preferably-parallelto each other and are preferably separatedby a distance "greater than. the'diameter of the journal 7, plus the twothicknesses of the journal-bearing 17, said parts 7 i and 17,1 be ing an assemblage ofimembers which collectively constitute a partition opera-tiv'el-y dividing the two lubricant chambers from each other. The walls 1.0 terminate, respecs tively, in oppositely inturned' lips 19, which are preferably formed integrally with contiguous walls 10 ,and 11 wherelthey unite.

7 By providing a width substantially as above specified between the walls 10, provision is made for imparting to the upper surfacesflt) of said lips-respectively, ajgentlecurvature whereby each 7 of said surfacesis, forthe promotion of the flow of lubricant, unade flush with the inclined faces 21, respectively, of partition bars 22*wherewiththe journal-bearing 17 is provided, in themanner and for the purpose which will gxresently be more fully set forth.

Below the lip 19 (theblockbeing regarded as normally suspended from the shackle 3') the walls '11 set out diver-gently there from, the angle of their 'divergence'beinm substantially that at-which, whenever the walls 10 assume a horizontal er downwardly -inclined position, asthey are eonstantly liablejat any time to do in service, she labric ating chamber whichis bounded en op posite sides by the wall 11, will; begin to feed by gravity a suitable lubricant to the juxtae posed surfaces of the-journal 7 and its hearing 17. Inv other words, solong, onthe one hand, as the walls 10: occupyany position above the horizontal between the =-vertioal and the horizontal, the'lubricant chamber of which they constitute the side walls will, by action of gravity, contribute a-r-supply of lubricant to the bearing. surfaces with which they communicate. On the other hand, at the momentsubstantially when the lubricant supply of one lubricant chamber ceases; to-flow by gravity, because of change of'position of the block, thenthe other lubricant chamber beings to functionate to keep said bearing surfaces properly lubricated.

ltshould beobserved that the reciprocal filnctionating of. the two' lubricating chamhere. ..in the manner just described takes placew thout regard to the plane in which the sheave 5 happens to be rotating, and that the, pair of lubricating chambers in one block-side, in disposlt on and functioning capacity, corresponds to the like pair of chambers in the companion bloclcside.

The journal-bearing I 17 which preferably is.fQrmedrseparate from the blocleside, is of a generally, cylindrical shape, as shown for example in Figure V. It is preferably made, of ,one piece of brass and of a weight sufiicient. tosqualify it as a structural member of the. block-side as well as a bearing member. ,Itis preferably provided near itsendnearer, the-sheave 5 with an internal annular recess 23 for the reception of a suitable, packing ring 24. r .:The member 17 is confined within the journal bearing support 16 of each blocksideuby undercuts 25 in the lower sides of the lips 19-.aswell as by. an annular seat 26 in. the Shell Stand by the reenforced wall 27 whichdefines an encircling aperture in the con-joint cover-plates 1e and 15. It is anchored-therein against rotation, as by lateral lugs 28 introduced from the inside of the block-side into close fitting-recesses provided for them, respectively, in the opposite lips 19.

.Theupper half of. the member 17 is pro vided, in effect, with asingle aperture 29 extending between theinside of-the shell 8 andtheopposingface of the cover-plate 14-, and from onelip 19 to the other. This is true despite the ;fact that a middle crossbar -30, as shown in the drawings, may,

without material obstructionto flow of lubricant, beiemployed, if desired, to lend stiffness to the cylindrical member 17.

In theaside of the member 17 opposite the V aperture 29 therein, I provide adjacent to the wallsll, respectively, two lubricant feed slotst3l- Whose. lateral walls 32, are located preferably'in .a plane approximately parvsheaveg fi. The function of the two washers 34 is to take the entire endsthrustin one direction or the other of the shaft 6, to which said sheave is united.

Each lubricant chamber is provided with aigfilling nipple 36 and a stopper, preferably a screw plug-37 threaded therein and preferably-countersunk in the shell or member 8.

The following brief description will, in view of-the foregoing specification, suth-ce to make the operation of my block clearly eral lubricant chambers through their respective nipples 36 which are afterwards securely closed as by their respective plugs The block is then ready for use with assurance that it will be adequately lubricated in any of the numberless positions it may and is likely to assume in use.

The end-thrust of theshaft 6 in either direction is caught upon one of the two wasln ers 34c and by it communicated to the jour nal-bearing 17 to whose end it is contiguous. In this regard the said member 17 becomes more than a mere bushing, and carries the major part of the working strain of the block. In order to capacitate it for performance of that function, it is not only made ofadequate weight of metal to endure the strain, but is incorporated into the blockside at a point where the structure thereof is, as above specified, braced on all sides by webs distributed with truss effect to receive and withstand the strain.

What I claim is:

1. In a device of the class described, a sidebearing member having an opening for a shaft and including a plurality of independent lubricant reservoirs closed from communication with one another disposed on substantially opposite sides of the shaft opening respectively, and said member having means whereby said reservoirs may communicate with a shaft extending through said opening, respectively, at substantially opposite sides thereof.

2. A side bearing member having an opening for a shaft and including a plurality of independent lubricant reservoirs closed from communication with one another and disposed on substantially opposite sides of the shaft opening, said reservoirs being adapted together to substantially encircle a shaft extending through said opening and said member having means whereby said reservoirs may communicate with the shaft, respectively, at substantially opposite sides thereof.

3. A side-bearing member having an opening therein for a shaft and including a plurality of independent lubricant reservoirs closed from one another and disposed, respectively, substantially above and below said opening, said member having means whereby said reservoirs may communicate respectively with substantially opposite sides of a shaft extending through the opening.

i. A side-bearing member having an opening therein for a shaft and including a plurality of' independent lubricant reservoirs closed from one another and disposed respectively substantially above and below said opening, said member having means whereby said reservoirs may communicate, respectively, with substantially opposite sides of a shaft extending through the opening and said reservoirs being adapted together to substantially encircle said shaft.

5. In a device of the class described. a side plate having a shaft bearing, and independent, separate lubricant reservoirs positioned respectively above and below the axis of said bearing, one adapted to deliver lubricant to the upper and the other to the lower portion of the bearing, said side plate having openings therein leading from said reservoirs to the bearing.

6. In a device of the class described, a block-side having a shaft bearing and lubricant reservoirs on opposite sides of the bearing, one of said reservoirs having side walls substantially parallel to each other, and the other reservoir having side walls diverging from each other and from the longitudinal axis of the first named reservoir.

7. In a device of the class described, a block-side having a shaft bearing and lubricant reservoirs on opposite sides of the bearing, one of said reservoirs having side walls substantially parallel to each other, and the other reservoir having side walls diverging from each other and Irom the longitudinal axis of the first named reservoir, said second reservoir having a bottom wall connecting the side walls, and block-side reinforcing ribs extending outwardly from said bottom wall in planes substantially radial with respect to said bearin 8. In a device of the class described, a block-side having a shaft bearing and lubricant reservoirs on opposite sides of the bearing surfaces, one of said reservoirs having side walls substantially parallel to each other, and the other reservoir having side walls diverging from each other and from the longitudinal axis of the first named reservoir, said second reservoir having a bottom wall connecting the side walls, and blockside reinforcing ribs extending outwardly from said bottom wall in a plane substantially radial with respect to said bearing, said bearing having openings at the diverging side walls of the second reservoir communicating with the said reservoir.

9. In a device of the class described, a block-side having a shaft bearing and lubricant reservoirs on opposite sides of the bearing surfaces, one of said reservoirs having side walls substantially parallel to each other, and the other reservoir having side walls diverging from each other and from the longitudinal axis of the first named reservoir, said second reservoir having a bottom wall of segmental form connecting the side walls, and block-side reinforcing ribs extending outwardly from said bottom wall in planes substantially radial with respect to said bearing.

10. In a device of the class described, a

, block-side havin a shaft bearin a lurality of separated, independent lubricant reservoirs disposed on opposite sides of the bearing, one of the said reservoirs having side walls provided with inwardly extending substantially juXta-positioned lips serving partly to form a bearing recess, the said reservoir having an opening between said lips for the passage of lubricant to the bearing.

11. In a pulley block, a rotatable sheave, a shaft carrying and rotatable With said sheave, side plates having bearings for said shaft, and a pair of independent separated luhrieant reservoirs in each side plate dis posed on opposite sides of the bearing, each shaft, a pair of independent separated lubri cant reservoirs in each side plate disposed on. opposite sides of the bearing, each plate having openings whereby the reservoirs communicate with the. bearing, and means for independently filling each reservoir.

In testimony whereof, I have hereunto set my hand.

FREDERICK B. MALLORY. 

